Cheowchan Leelasukseree. Standup time estimation of undercut moist sand slope using numerical simulations. (). King Mongkut's University of Technology North Bangkok. Central Library. : , 2020.
Standup time estimation of undercut moist sand slope using numerical simulations
Abstract:
Undercut slope is defined as a slope, which is excavated at
its toe. An undercut slope would be failed if undercut width is
equal to or greater than its maximum undercut width.
Sometimes, the undercut slope is temporarily stable. The
undercut slope could displace slowly over a period and it finally
fails. The period of undercut slope in stable is called standup
time. In this paper, the standup time was estimated by using
numerical simulations. A series of numerical simulations using
3DEC was performed to study of standup time of undercut
slopes. The numerical models were applied the physical
properties and creep parameters of moist sand, which were
tested in laboratory. Mohr-Coulomb and Burgers model were
assigned to the numerical simulations. The slope inclination of
the numerical models was varied. The slope inclinations were
50°, 30°, 18° and 15°. The undercut slope models showed a
relationship between slope inclination, undercut width and
standup time. When the slope inclination was shallower than
the friction angle of bedding plane, its standup time and
undercut width were longer and wider than the steeper. The
slope inclination was inversely proportional to undercut width
while the undercut width was proportion to the standup time.
King Mongkut's University of Technology North Bangkok. Central Library